George c



May 7, 1929.

G. c. DAVIS VALVE Filed Aug. 26, 1925 Patented May 7, 1929.

l PATENT OFFICE.

GEORGE C. DAVIS, F CHICAGO, ILLINOIS.

VALVE.

Application led August 26, 1925. Serial No. 52,506.

This invention relates to an 'oriiice changing valve, andin the form shown herewith particularly to a type of valve in which a removable orifice platev is positioned within l the valve. In connection with such valves,

' ttings, pressure and flow gauges are commonly installed. Itis one object of the invention to provide such a valve wherein the orifice plate or member may be changed or removed without/removing the fitting and withoutpshutting olf the iiow through the line in which the valve is applied. Other objectsv will appear from time toy time throughout thespecification and claims.

My inventionis illustrated more or less diagrammatically in the accompanying drawing wherein: Figure 1 is a side elevation with parts 1n section showing the valve housing;

the line 2-2 of Figure 1;

Figure 3 is a vertical cross section on line 3-3 of vFigure 1;

Figure 4 is a cross section on line 4 4 of Figure 1.

Like parts are indicated by like characters throughout. f

A is a section of ipe, and A1 is va communicating section. he two are joined to a valve housing formed of the arts B and C. The part B is-provided wlthv a flange B1 to which a collar B2 may be bolted, the collar being fastened to [the 'ipe,A. At the end opposite the flange B1, t e parts B is provided with a lateral extension B3 which has formed within it a cavity B4 and openings B B". The opening B5 is closed by a removable plate B7 which is removably attached by means of screws B1. The part B7 is pro- 40 vided with a central perforatlon in which is threaded a screw B which carries at its in-v ner end a-reduced portion B1, having on it a head or nut B11. The hole Bs is closed by a plate B12 which is held in position by screws B11x and isprovided with an inwardly extending iiange B1. B1 B15. are locking. screws positioned -in the member B adjacent the lateral extension B3. The open end of. the cavity B4 is closed by a plate B1, which 5 .is held in position by screws B11., B1 is a rod mounted within the cavity B* and gllapted for a use which will be described Figure' 2is a horizontal cross section on' wardly extending ring E2 formed on the casing part B3 opposite it.

The part C is provided with a ange C1 which is joined to a collar C2 on the pipe 55 section 'A1.

D is a carrier. It is provided with a perforation within which is removably 'seated an orifice plate D1 having a perfora- .tion D2. Fastened to one edge of the caro0 rier D is a pair of perforated members D. These membersare mounted on the guide rod B18 and are adapted to slide along it, thus guiding and supportingthe carrier D upon the rod B18. *D* is the carrier rod. It is attached to the carrier at one end, extends beyondI the lcasing at the other, and at its exposed end carries a handle D. D6 is a limiting and starting screw mounted in the part B3 and extending into the cavity B. 70 It serves to position and to limit the movement'of the carrier in the left hand direction as shown in Figures 1 and 2. It serves also as a means for initiating the reverse movement of the carrier. Thus when it is de- 'sired to move the carrier in the right hand position as shown in Figures 1 and 2, the screw D6 may be 'screwed inward so as to start the reverse movement.

E is a carrier clam It is loosely mounted on the part B10 of t e screw B. It is generallyV cup-shaped as shown and provided with an inwardly extending narrow edge E1 which is generally the same size as .the in- F F1 are gauge connections. They are not shown in full detail nor is the gauge shown because these features form no particular part of the present invention. They are shown merely to indicate-that gauges are frequently used in this type of fitting.

G is aremovable drain plugrwhich may be removed to permit drainage om the cavity B4 within the casing.

Although I have shown an operative device, still it will beA obvious that many changes might be made, in size, shape and arrangement of parts without-departing materially from the spirit of my invention; and I Wish, therefore, that my showing be taken as in a sense diagrammatic.

The use and operation of my invention are as follows: j v In normal operation the parts are as shown in Figures 1 and 2. As there shown the pipe line is horizontal. The orifice plate is vertical extending through it.` The parts might, of course, be in any other position but whatever the position of the 'pipe with relation to the horizontal, the orifice plate extends through it and forms an orifice of smaller diameter than the interior of the When the parts are in this position, the locking screws B15 are screwed tight against the orlfice plate and removal or shifting of the parts is prevented.

For many purposes it is necessary to remove the orifice plate either for the purpose of re air or to insert uva plate having a different size orifice. When this is to be done, the lockin screws B15 are first loosened. The screw is then screwed inward and initiates the withdrawingpovement of the carrier and orifice plate'. This movement is continued farther by pulling on the handle D5 of the carrier rod D4, and the movement is continued until the orifice plate is moved Wholly out of line with the pipe and lies within the 'cavity B4 within the clamp member E.

In this position the carrier and plate havlng been removed from the pipe line, the

.slot which is normally occupied by the carrier or plate on one side of the pipe line, is opened and gas can escape from it into the part of the cavity 1 34 surrounding the carrier clamp but it cannot go further. The

- screw B9 is then tightened and the carrier clamp is forced against the carrier, and thus forcesthe carrier upward against the inwardly extending ring E2. When sufficient pressure has been exerted so that the clamp has forced the carrier against the ring E2 and has sealed the two, then the orifice removing portion is opened by removing the plate B12. The orifice plate can then be remved and escape of gas or other fluid from the assembly is impossible because of the fact that the carrier plate is forced against the ring E2 by means of the clamp E. Another orifice plate is replaced within the carrier, the plate B12 is again seated. and secured in position and the screw BF is slightly loosened. Since as shown the portion B10 of the -screw B9 fits loosely within the perforation through the carrier clamp K E, gas or other fluid passes at once into the interior ofthe clamp E, that is into the space between the clamp E and the orifice Y plate, and thus pressure is equalized on both ,-650 'further movement of the screw B9.

sides of the carrier clamp E. Then the carrier clamp may be further loosened by the The carrier and orifice plate are then moved back to the left as shown in Figures 1 and 2 until the orifice late is' againin position in the pipe line. he locking screws B are then again tightened and the parts are in position for use. f l y Thus an apparatus is provided whereby the orifice plate can be removed or repaired without interrupting the flow through the pipe line and without in any way detaching any parts from the pipe line, the valve connections or the gauges.

I claim:

1. In combination with a housing, an orifice member within the same, means-.to permit removal of said member including a housing normally unoccupied and having a chamber adapted to communicate with said first housing and adapted to receive said orifice member, said second housing formed with an opening through which said member may be removed, and a carrier for said orifice member mounted for movement with-` in said housings, and a cap member within said second housing adapted to cooperate in closing said opening for the removal of the orifice member, said cap member adapted to engage the carrier in sealin contact, said cap mounted on a screw vw ereby it may be moved by the movement of said screw, the screw being provided with an extension and the cap with a perforation, the extension lying within the perforation and being smaller than the same to permit leakage through such riot screwed tightly into place.

2. In combination with a housing, an orifice member within the same, means to permit removal of said member including a housing having a chamber adapted to communicate with said first housing and adapted to receive said orifice member, said second housing formed with anopening through which said member may be removed, and a carrier for said orifice member mounted for movement .within said housings, and a cap member within said second housing adapted to cooperate in closing said opening for vthe removal of the orifice member, said cap member adapted to engage the carrier in sealing contact, andan inwardly projecting annulus in said second housing against which said cap forces said carrier whereby the sealing contact'is completed, said cap mounted on a screw whereby it may be moved by the movement of said screw, thel screw being provided with an extension, and the cap with a perforation, the extension lying within the perforation and being smaller than the same to permit leakage through such perforation when the screw is not screwed tightly into place.

3. In combination with a housing, an orifice member within the same, means' to permit removal of' said member, including a,

erforation when the screw is iing said opening for removal of said mem leakage through such ervforation when the ber, said cap mounted on a. screw whereby screw 1s not screwed tightly into place.

it may be moved by the movement of said Signed at Chicago, county of Cook7 and l0 screw, the screw being provided with an State of Illinois, this 20th day of August, l extension and the cap with a perforation, 1925. K

the extension lying within the perforation and being smaller than the same to permit GEORGE C. DAVIS. 

